* stable-3.0:
Update git submodules
Fix 'visibleto' predicate for group
Upgrade recommended version of buildifier to 3.0.0
Update git submodules
Update git submodules
Manually carry the buildifier upgrade change from downstream
dev-contributing.txt.
Change-Id: I35b89bd97cac99e8f9744dfdac9d3f9ba28871fd